AU716962B2 - Delayed release flavourant compositions - Google Patents
Delayed release flavourant compositions Download PDFInfo
- Publication number
- AU716962B2 AU716962B2 AU55885/96A AU5588596A AU716962B2 AU 716962 B2 AU716962 B2 AU 716962B2 AU 55885/96 A AU55885/96 A AU 55885/96A AU 5588596 A AU5588596 A AU 5588596A AU 716962 B2 AU716962 B2 AU 716962B2
- Authority
- AU
- Australia
- Prior art keywords
- diol
- hexadiene
- bis
- lower alkyl
- tobacco
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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- 239000000203 mixture Substances 0.000 title claims description 45
- 239000000796 flavoring agent Substances 0.000 title claims description 42
- 230000003111 delayed effect Effects 0.000 title claims description 8
- 241000208125 Nicotiana Species 0.000 claims description 36
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims description 36
- 125000000217 alkyl group Chemical group 0.000 claims description 33
- 230000000391 smoking effect Effects 0.000 claims description 29
- 150000001875 compounds Chemical class 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 21
- 235000019634 flavors Nutrition 0.000 claims description 16
- 239000000654 additive Substances 0.000 claims description 15
- 235000013305 food Nutrition 0.000 claims description 15
- 230000000996 additive effect Effects 0.000 claims description 12
- -1 methylenedioxy Chemical group 0.000 claims description 12
- 150000000180 1,2-diols Chemical class 0.000 claims description 11
- 150000002009 diols Chemical class 0.000 claims description 11
- 125000003545 alkoxy group Chemical group 0.000 claims description 10
- 235000019504 cigarettes Nutrition 0.000 claims description 10
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 9
- AXCXHFKZHDEKTP-NSCUHMNNSA-N 4-methoxycinnamaldehyde Chemical compound COC1=CC=C(\C=C\C=O)C=C1 AXCXHFKZHDEKTP-NSCUHMNNSA-N 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 8
- RUONIKSTGGMBQA-UHFFFAOYSA-N 1,6-bis(4-methoxyphenyl)hexa-1,5-diene-3,4-diol Chemical compound C1=CC(OC)=CC=C1C=CC(O)C(O)C=CC1=CC=C(OC)C=C1 RUONIKSTGGMBQA-UHFFFAOYSA-N 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 235000019505 tobacco product Nutrition 0.000 claims description 6
- UNYHLJIXRHFQTO-UHFFFAOYSA-N 7,10-dibenzylidenehexadecane-8,9-diol Chemical compound C=1C=CC=CC=1C=C(CCCCCC)C(O)C(O)C(CCCCCC)=CC1=CC=CC=C1 UNYHLJIXRHFQTO-UHFFFAOYSA-N 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- AVIIWHKOUNFPIY-PHEQNACWSA-N (1e,5e)-1,6-diphenylhexa-1,5-diene-3,4-diol Chemical compound C=1C=CC=CC=1/C=C/C(O)C(O)\C=C\C1=CC=CC=C1 AVIIWHKOUNFPIY-PHEQNACWSA-N 0.000 claims description 3
- FEQZTUASSSOEFA-UHFFFAOYSA-N 1,2-bis(4-hydroxy-3-methoxyphenyl)ethane-1,2-diol Chemical compound C1=C(O)C(OC)=CC(C(O)C(O)C=2C=C(OC)C(O)=CC=2)=C1 FEQZTUASSSOEFA-UHFFFAOYSA-N 0.000 claims description 3
- ZRPMNODCXDTMNY-UHFFFAOYSA-N 1,2-bis(1,3-benzodioxol-5-yl)ethane-1,2-diol Chemical compound C1=C2OCOC2=CC(C(C(O)C=2C=C3OCOC3=CC=2)O)=C1 ZRPMNODCXDTMNY-UHFFFAOYSA-N 0.000 claims description 2
- RKRWHUXXTPLPAL-UHFFFAOYSA-N 1,2-bis(4-methoxyphenyl)ethane-1,2-diol Chemical compound C1=CC(OC)=CC=C1C(O)C(O)C1=CC=C(OC)C=C1 RKRWHUXXTPLPAL-UHFFFAOYSA-N 0.000 claims description 2
- IJWMKBQGAWKRAX-UHFFFAOYSA-N 3,4-dimethyl-1,6-bis(2,6,6-trimethylcyclohex-2-en-1-yl)hexa-1,5-diene-3,4-diol Chemical compound CC1=CCCC(C)(C)C1C=CC(C)(O)C(C)(O)C=CC1C(C)(C)CCC=C1C IJWMKBQGAWKRAX-UHFFFAOYSA-N 0.000 claims description 2
- POXJRJSMGJGQBE-UHFFFAOYSA-N 3,4-dimethyl-1,6-bis(2,6,6-trimethylcyclohexen-1-yl)hexa-1,5-diene-3,4-diol Chemical compound CC1(C)CCCC(C)=C1C=CC(C)(O)C(C)(O)C=CC1=C(C)CCCC1(C)C POXJRJSMGJGQBE-UHFFFAOYSA-N 0.000 claims description 2
- IHPDTPWNFBQHEB-UHFFFAOYSA-N hydrobenzoin Chemical compound C=1C=CC=CC=1C(O)C(O)C1=CC=CC=C1 IHPDTPWNFBQHEB-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 150000002431 hydrogen Chemical class 0.000 claims 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 12
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- 239000003205 fragrance Substances 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- IVDFJHOHABJVEH-UHFFFAOYSA-N HOCMe2CMe2OH Natural products CC(C)(O)C(C)(C)O IVDFJHOHABJVEH-UHFFFAOYSA-N 0.000 description 5
- 238000005160 1H NMR spectroscopy Methods 0.000 description 4
- 101150041968 CDC13 gene Proteins 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- MWOOGOJBHIARFG-UHFFFAOYSA-N vanillin Chemical compound COC1=CC(C=O)=CC=C1O MWOOGOJBHIARFG-UHFFFAOYSA-N 0.000 description 4
- FGQOOHJZONJGDT-UHFFFAOYSA-N vanillin Natural products COC1=CC(O)=CC(C=O)=C1 FGQOOHJZONJGDT-UHFFFAOYSA-N 0.000 description 4
- 235000012141 vanillin Nutrition 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 150000001299 aldehydes Chemical class 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 150000002576 ketones Chemical class 0.000 description 3
- 230000008786 sensory perception of smell Effects 0.000 description 3
- 230000014860 sensory perception of taste Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 235000019568 aromas Nutrition 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- KJPRLNWUNMBNBZ-QPJJXVBHSA-N (E)-cinnamaldehyde Chemical compound O=C\C=C\C1=CC=CC=C1 KJPRLNWUNMBNBZ-QPJJXVBHSA-N 0.000 description 1
- AVIIWHKOUNFPIY-UHFFFAOYSA-N 1,6-diphenylhexa-1,5-diene-3,4-diol Chemical compound C=1C=CC=CC=1C=CC(O)C(O)C=CC1=CC=CC=C1 AVIIWHKOUNFPIY-UHFFFAOYSA-N 0.000 description 1
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 1
- 241000219310 Beta vulgaris subsp. vulgaris Species 0.000 description 1
- 244000223760 Cinnamomum zeylanicum Species 0.000 description 1
- 241000533293 Sesbania emerus Species 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 244000028419 Styrax benzoin Species 0.000 description 1
- 235000000126 Styrax benzoin Nutrition 0.000 description 1
- 235000021536 Sugar beet Nutrition 0.000 description 1
- 235000008411 Sumatra benzointree Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 229940117916 cinnamic aldehyde Drugs 0.000 description 1
- KJPRLNWUNMBNBZ-UHFFFAOYSA-N cinnamic aldehyde Natural products O=CC=CC1=CC=CC=C1 KJPRLNWUNMBNBZ-UHFFFAOYSA-N 0.000 description 1
- 235000017803 cinnamon Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000005454 flavour additive Substances 0.000 description 1
- 235000013355 food flavoring agent Nutrition 0.000 description 1
- 235000003599 food sweetener Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 235000019382 gum benzoic Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 239000003765 sweetening agent Substances 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 238000001149 thermolysis Methods 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C33/00—Unsaturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C33/28—Alcohols containing only six-membered aromatic rings as cyclic part with unsaturation outside the aromatic rings
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L27/00—Spices; Flavouring agents or condiments; Artificial sweetening agents; Table salts; Dietetic salt substitutes; Preparation or treatment thereof
- A23L27/20—Synthetic spices, flavouring agents or condiments
- A23L27/204—Aromatic compounds
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L27/00—Spices; Flavouring agents or condiments; Artificial sweetening agents; Table salts; Dietetic salt substitutes; Preparation or treatment thereof
- A23L27/70—Fixation, conservation, or encapsulation of flavouring agents
- A23L27/75—Fixation, conservation, or encapsulation of flavouring agents the flavouring agents being bound to a host by chemical, electrical or like forces, e.g. use of precursors
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
- A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
- A24B15/301—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances by aromatic compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C43/00—Ethers; Compounds having groups, groups or groups
- C07C43/02—Ethers
- C07C43/20—Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring
- C07C43/23—Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring containing hydroxy or O-metal groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Nutrition Science (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture Of Tobacco Products (AREA)
- Fats And Perfumes (AREA)
- Seasonings (AREA)
Description
S F Ref: 339252
AUSTRALIA
PATENTS ACT 1990 COMPLETE SPECFICATION FOR A STANDARD PATENT
ORIGINAL
Name and Address of Applicant: Actual Inventor(s): Address for Service: Invention Title: Givaudan-Roure (International) SA CH-1214 Vernier Geneve
SWITZERLAND
Denise Anderson Spruson Ferguson, Patent Attorneys Level 33 St Martins Tower, 31 Market Street Sydney, New South Wales, 2000, Australia Delayed Release Flavourant Compositions
S
The following statement is a full description of this invention, including the best method of performing it known to me/us:- 5845 Ref. 6510/268 The invention concerns delayed release flavourant compositions.
In particular, these compositions are selected from the group consisting of a) smoking compositions and b) foodstuffs, in particular bl) bakeable foodstuffs and b2) microwaveable foodstuffs containing flavour-release additives, namely 1,2-diols of the formula OH OH R -C C- R I
R
2
R
wherein R 1 is one of the radicals 3
R
a C-- 00a) I n4
R":
R4 b)
O
S* 4* C Ur/So 15.3.96 where
R
2 is H, lower alkyl R, R 4 are H, lower alkyl, lower alkoxy, hydroxy, or R 3
R
4 together are methylenedioxy, R' is lower alkyl and the broken lines represent in the ring one additional bond and in the side chain an optional bond.
Accordingly, a first aspect of the present invention provides a delayed release nlavourant composition, selected from the group consisting of a) a smoking composition o0 comprising an admixture of a combustible filler [being natural tobacco, reconstituted tobacco or a tobacco substitute], and b) a foodstuff containing an organoloeptically effective amount of a flavorant-release additive, the flavourant-release additive being a 1,2 diol of the formula OH OH I I -R 1 R I R2 R 2 R R wherein R' is one of the radicals
R
3 R (a C=C- 4
R
3 (b) 4
R
4 where 2R is H, lower alkyl
R
3
R
4 are H, lower alkyl, lower alkoxy, hydroxy, or R R 4 together are methylenedioxy,
R
5 is lower alkyl [T Of [L\DAYLIBLIBA]02937 doc:TLT 2a and the broken lines represent in the ring one additional bond and in the side chain an optional bond.
A second aspect of the present invention provides a method of flavouring a smoking composition, e.g. tobacco, or a food, comprising adding to the smoking composition, e.g.
tobacco, or treating a food with an organoleptically effective amount of a 1,2-diol of the formula OH OH R -C-C-R I R2
R
2 wherein R' is one of the radicals
R
3 R
I
R
4
R
3 (b)
R
4 C -C- 10 where iR 2 is H, lower alkyl pR 3
R
4 are H, lower alkyl, lower alkoxy, hydroxy, or R 3
R
4 together are methylenedioxy, R' is lower alkyl and the broken lines represent in the ring one additional bond and in the side chain an optional bond.
A third aspect of the present invention provides a method of flavouring a smoking composition, e.g. tobacco, or a food, comprising igniting and burning the smoking composition, e.g. tobacco, or baking or microwaving the foodstuff containing an organoleptically effective amount of a 1,2-diol of the formula [I.\DAYLIB\LIBA]02937 doc:TLT 2b OH OH
R
1 -C C-R 1 wherein R' is one of the radicals (a)I (b)
C=-C-
where R2 is H, lower alkyl R RI are H, lower alkyl, lower alkoxy, h-ydroxy, or RI R 4 together are methiylenedioxy, R' is lower alkyl and the broken lines represent in the ring one additional bond and in the side chain an o0 optional bond.
A fourth aspect of the present invention provides the process for the preparation of I ,6-bis (4-miethoxyphenyl)- 1,5-hexadiene-3 ,4-diol or of 2,5-dihiexyl- 1,6-diphenyl- hiexad iene-3 ,4-diol, comprising subjecting I ,4-methoxycinnamaldehyde or a1-hexyl- Icinniami-aldehyde to pinacolisation.
1' A fifth aspect of the present invention provides the use of thle 1 ,2-diols of the formula OH OH
R
1 -C C-R
I
1 2. 112 99R R wherein R' is one of the radicals -13 00
R
3 Ro
I
I
C=C-
R
4
R
3 (b)
R
4 where R is H, lower alkyl
R-
3
R
4 are H, lower alkyl, lower alkoxy, hydroxy, or R 3
R
4 together are Smethylenedioxy, R. is lower alkyl and the broken lines represent in the ring one additional bond and in the side chain an optional bond, as delayed flavourant release additives for smoking compositions and for food.
to These diols I possess no detectable flavour or odour themselves at normal temperatures and atmospheric conditions but function mainly as flavour precursors, in as far as they release a flavourant upon heating at higher temperatures, e.g. temperatures leading lto pyrolysis and thermolysis respectively. The diols I thus may be used as flavourants in smoking compositions, e.g. in tobacco compositions or tobacco substitutes, as sustained 15 flavourants and odorants to mask or enhance the flavours and odours of burning tobacco products, as flavour additives to foods, in particular bakeable and microwaveable foods.
The term lower alkyl and the alkyl portion of lower alkoxy radical suitably refers to straight or branched alkyl residues carrying from 1 to 6 carbon atoms. Suitable examples lor the individual residues are as follows: "0 2 HI, CH3-, C2Hs 5 etc.
1 3
R
4 CH3, C2Hs, n- or iso- C 3
H
7 t-C 4
H
9 etc.
R' CH 3
C
2
H
5 n- or iso- C 3
H
7 t-C 4
H
9 CsHII, C6cJ 1 3 etc.
[I \DAYLIB\LIBA]02937.doc:TLT 2d Although the two radicals R' of formula I may be different from each other and the two radicals R 2 may also be different from each other, in the preferred aspects these radicals R and R 2 respectively are the same.
As used herein the term "organoleptic" refers to compounds I which stimulate the sense of smell or taste, and are thus perceived as having a characteristic odour and/or fiavour.
The terms "odour", "fragrance" and "smell" are used interchangeably whenever a compound is referred to as an organoleptic which is intended to stimulate the sense of smell.
[I:\DAYLIB\LIBA]02937 doc TLT The terms "flavour", "flavouring" and "flavourant" are also used interchangeably whenever an organoleptic compound is referred to which is intended to stimulate the sense of taste.
An "organoleptically effective amount" is a level or amount of the compounds(s) I present in a material at which the incorporated compound(s) exhibit(s) a sensory effect, e.g. by stimulating the sense of smell or taste.
The terms "tobacco" and "tobacco substitutes" are used in the conventional sense and include smokable as well as non-smokable forms in which tobacco is regularly used, e.g. cigarettes, snuff chewable compositions, etc.
The term "tobacco paper" refers to smokable paper used to contain tobacco, e.g. tobacco rolling paper.
The terms "food" and "foodstuff' are used interchangeably.
15 The term "food product" would consequently designate the product of the process to which the foodstuff(s) containing the diol I is (are) subjected to.
The term "tobacco substitute" is meant to include non-tobacco filled materials such as smoking products from sugar beet pulp, coffee bean hulls and other cellulosic or carbohydrate materials, etc.
20 The preferred compounds I are o 1,6-diphenyl-1,5-hexadiene-3,4-diol, 2,5-dihexyl-1,6-diphenyl-1,5-hexadiene-3,4-diol and 1,2-bis(4-hydroxy-3-methoxyphenyl)-1,2-ethanediol.
Further suitable compounds I include 3,4-dimethyl-1,6-bis(2,6,6-trimethyl-l-cyclohexen-l-yl)-1,5-hexadiene-3,4-diol, 3,4-dimethyl-1,6-bis(2,6,6-trimethyl-2-cyclohexen-1-yl)-1,5-hexadiene-3,4-diol, 1,2-bis(1,3-benzodioxol-5-yl)-1,2-ethanediol, 1,2-bis(4-methoxyphenyl)-1,2-ethanediol, 1,2-diphenyl-1,2-ethanediol or 1,6-bis(4-methoxyphenyl)-1,5-hexadiene-3,4-diol.
-4- The compounds I possess organoleptic properties and therefore permit the development of methods useful in enhancing the flavour of foods. These compounds are also useful in enhancing the odour, masking any unpleasant odour or enhancing the flavour of tobacco products.
These compounds may be used individually in an amount effective to enhance a characteristic flavour or odour of a given material. The compounds may also be mixed with other flavour or fragrance components in an amount sufficient to provide the desired flavour or odour characteristic.
The amount required to produce the desired, overall effect varies depending upon the particular compound chosen, the product in which it will be used, and the particular effect desired.
For example, depending upon the selction and concentration of the compounds I used, addition of the compounds I either singly or as a mixture to cigarette tobacco at levels ranging from about 5 ppm to about 50 000 ppm tends to enhance the smoking flavour and/or mask undesirable smoking odours. An important property of these compounds I is that the flavourant or odorant is covalently bound as an non-volatile compound and it is only when the tobacco product is ignited and burns that the flavourant or odorant is released.
Addition of the diols I of formula I either separately or as a mixture at levels suitably ranging from about 5 ppm to about 50 000 ppm by weight onto the media enclosing the tobacco serves to incorporate the odorant/flavourant in the side-stream smoke as the tobacco product burns. Air borne 25 flavourants and/or odorants along with other combustion products are thus introduced. This newly formed odorant or flavourant serves to enhance or maskthe smoking odours depending upon selection and use levels of the compounds I.
The diols I are also particularly useful in the flavouring and aromatizing of cooked foods. Addition of the diols either singly or as a mixture to a cake batter,. e.g. a microwave cake batter, serves to impart appropriate baking aromas to the cake as it is heated in the microwave as well as impart flavouring in the finished product. Typically, diols I are employed at levels ranging from about 0.0005 to about 10%, in particular from 0.05 to about 5.00%.
In addition to the baking aromas, other pleasant organoleptic properties may be provided, the palette is broad and may comprise depending on the compound I used floral, fruity, sweet, herbaceous, balsamic, spicy, cinnamon, woody, vanillin notes.
Notewortly are, furthermore, the stability of the novel flavourants.
A suitable temperature range may extend from about 70'C to about 300 0 C, or even more.
The compounds I may be incorporated into the foodstuff or the smoking composition, e.g. the tobacco product along with other ingredients. Such other ingredients include emulsifiers, carriers, binders, sweeteners, stabilizers, buffers and solvents, etc.
The addition of the diol I may generally be effected according to methods known in the art, e.g. as such or dissolved in any suitable solvent, e.g. in an alcohol, such as ethanol or aqueous ethanol, etc. It may then be sprayed or injected into the tobacco and/or tobacco substitute matrix. Such method ensures an even distribution of the flavourant additive throughout the filler, S" and thereby facilitates the production of a more uniform smoking composition. Alternatively, the flavourant may be incorporated as part of a concentrated tobacco extract which is applied to a fibrous tobacco web as in 20 the manufacture of reconstituted tobacco. Another suitable procedure is to incorporate the flavourant in tobacco or tobacco substitute filler in a concentration between about 0.5-5 weight percent, based on the weight of filler, and then subsequently to blend the treated filler with filler which does not contain flavourant additive. Naturally, the additive can also be present as 25 a surface coating or absorbed component of the paper wrapper, and/or the additive can be incorporated as a component of the adhesive formulation which is utilized to seal the sideseam of cigarette paper wrappers.
A large number of the compounds I actually the majority thereof are known. In as far as the novel compounds are concerned, the following applies: Pinacol diols can be prepared from the corresponding aldehydes and ketones by standard methods known to those skilled in the art see Comprehensive Organic Synthesis, Barry M. Trost, ed., Vol. 3, 1991, pp 563- 579. For example, reaction of aldehydes or ketones with metals e.g. Zn, Mg, Ce, Al(Hg) or Ti and acid e.g. acetic acid provides pinacol diols I.
-6- Various aldehydes and ketones can also be transformed by electrochemical means to their pinacol diols. Pinacol diols can also be prepared by reduction of benzoins. All these methods are outlined by B.M. Trost.
The two novel compounds of this invention, i.e. 1,6-bis (4-methoxyphenyl)-1,5-hexadiene-3,4-diol and 2,5-dihexyl-1,6-diphenyl-1,5-hexadiene- 3,4-diol are thus easily obtained by subjecting 1,4-methoxycinnamaldehyde or a-hexylcinnamaldehyde to pinacolisation as outlined above.
The following examples are set forth herein to illustrate methods of synthesis of the pinacol diol derivatives I and their use as flavourants and flavour precursors. These examples are intended only to illustrate the embodiments of this invention and are in no way meant to limit the scope thereof.
All parts, proportions, percentages and ratios used herein are by weight unless otherwise indicated.
Example 1 S• 1.6-Diphenyl-1,5-hexadiene-3,4-diol A mixture of cinnamaldehyde (200 g, 1.5 mol), zinc (98.9 g, 1.5 mol), water (380 ml), and ether (230 ml) was heated to reflux under a nitrogen atmosphere. Acetic acid (175 ml) was added over a 2 hour period. The 20 reaction was heated at reflux for an additional 3 hours. The mixture was cooled and filtered. Ethyl acetate and ether were added and the mixture was washed sequentially with water (2 aqueous sodium bicarbonate solution until neutral, brine, and dried over sodium sulfate, filtered, and the solvent was evaporated under reduced pressure. The syrup obtained was crystallized from ethyl acetate to give meso-1,6-diphenyl-l,5-hexadiene-3,4diol.
mp: 150-152 0 C, 1 H-NMR (CDC13) 5 7.42-7.20 (10 H, 6.71 (2 H, d, J 15.87 Hz), 6.29 (2 H, dd, J 6.41 and 15.87 Hz), 4.49-4.39 (2 H, 2.24 (2 H, OH). IR (KBr) 3298, 2908, 1449, 963, 746 cm 1 MS m/e abundance) 266 133 (100), 115 77 55 (67).
d,l-1,6-Diphenyl-1,5-hexadiene-3,4-diol can be isolated from the reaction mixture.
-7- 1 H-NMR (CDC13) 5 7.42-7.20 (10 H, 6.72 (2 H, d, J 16.17 Hz), 6.34-6.18 (2 H, 4.32-4.24 (2 H, 2.55 (2 H, IR (KBr) 3313, 1449, 1047, 970, 690 cm- 1 MS m/e abundance) 266 133 (100), 115 55 (29).
Example 2 1.6-Bis(4-methoxvphenyl)-1.5-hexadiene-3,4-diol In a fashion similar to that described in Example 1, 1,4-methoxycinnamaldehyde was treated with zinc and acetic acid to provide 1,6-bis(4methoxyphenyl)-1,5-hexadiene-3,4-diol.
mp: 145-146°C. 1 H-NMR (CDC13) 87.34-7.28 (4 H, 6.86-6.61 (4 H, 6.69- 6.59 (2 H, 6.29-6.06 (2 H, 3.80 (6 H, IR (KBr) 3365, 2956, 2838, 1606, 1512, 1252, 1031 cm- 1 MS m/e abundance) 326 163 (100), 55 (18).
Example 3 2.5-Dihexyl-1,6-diphenvl-1.5-hexadiene-3.4-diol "In a fashion similar to that described in Example 1, a-hexylcinnamaldehyde was treated with zinc and acetic acid to provide 1,6-diphenyl-1,5-hexadiene-3,4-diol.
mp: 86-86.5, 1 H-NMR (CDC13) 8 7.38-7.16 (10 H, 6.73 (2 H, bs), 4.33 (2 H, bs), 2.56-2.46 (4 H, 2.14-2.06 (2 H, 1.60-1.49 (4 H, 1.40-1.21 (10 H, 0.90-0.84 (6 H, IR (KBr) 3455, 3296, 2922, 2853, 1454, 1091, 699 cm- 1 20 MS m/e abundance) 434 218 217 (100), 91 (22).
Example 4 Preparation of an a-hexylcinnamaldehyde cigarette An ethyl acetate solution of the compound from Example 3 was applied to cigarette papers at the rate of 1000 ppm. (Application rates of 5 to 50'000 ppm may actually be useful). The paper was incorporated into cigarettes.
Prior to smoking, no odour of a-hexylcinnamaldehyde was observed. Upon smoking, a noticeable and persistent floral odour was observed in the room air. The floral odour was, actually, already observed on first puff.
-8- Example Preparation of a vanillin cigarette An alcohol/water solution of the compound 1,2-bis(4-hydroxy-3methoxyphenyl)-1,2-ethanediol was applied to cigarette papers at the rate of 500 ppm. The paper was incorporated into cigarettes. Prior to smoking, no odor of vanillin was observed. Upon smoking a faint, but distinct odour of vanillin was observed in the room air.
a
Claims (16)
1. A delayed release flavourant composition, selected from the group consisting of a) a smoking composition comprising an admixture of a combustible filler [being natural tobacco, reconstituted tobacco or a tobacco substitute,] and b) a foodstuff containing an organoleptically effective amount of a flavorant-release additive, the flavourant-release additive being a 1,2 diol of the formula OH OH I I I R -C C-R R 2 R 2 wherein R 1 is one of the radicals I C- C- where R 2 is H, lower alkyl R 3 R 4 are H, lower alkyl, lower alkoxy, hydroxy, or R 3 R 4 together are methylenedioxy, R 5 is lower alkyl and the broken lines represent in the ring one additional bond and in the side chain an optional bond.
2. A smoking composition of claim 1 which is a cigarette smoking product comprising a combustible filler [being natural tobacco, reconstituted tobacco or a tobacco substitute], and a paper wrapper which has incorporated therein a flavorant-release additive, the flavorant-release additive being a 1,2 diol of the formula OH OH R 1 I R2 R 2 wherein R 1 is one of the radicals R 3 R (a) C C- R4 R 3 (b) R4 C- C-- where 2 9R 2 R is H, lower alkyl i R 3 R 4 are H, lower alkyl, lower alkoxy, hydroxy, or R R 4 together are n methylenedioxy, R' is lower alkyl and the broken lines represent in the ring one additional bond and in the side chain an optional bond. s
3. A composition according to claim 1, wherein the foodstuff is a bakeable foodstuff. RO4 NT [I:\DAYLIB\LIBA]02937.doc:TLT -11-
4. A composition according to Claim 1, wherein the foodstuff is a microwaveable foodstuff. A composition according to any one of Claims1 to 4, wherein the concentration of the flavourant release additive is ca. 0,0005 to ca. 10 preferably ca.0,005 to ca. 5 w/w.
6. A composition according to any one of Claims 1 to 5, wherein the flavourant additive is released preferably during ignition and burning of the smoking composition, e.g. the tobacco product or during the baking or the microwaving process of the foodstuff.
7. A composition according to any one of Claims 1 to 6, wherin R 3 and R 4 in the formula I a) diol is hydrogen.
8. A composition according to any one of Claims 1 to 6, wherein R 2 is hydrogen
9. A composition according to any one of Claims 1 to 6, wherein R 2 in 15 the formula I b) diol is methyl.
10. A composition according to any one of Claims 1 to 6, wherein R 2 in the formula I c) diol is methyl and there is an optional bond in the side chain of the molecule.
11. A composition according to any one of Claims 1 to 6, wherein the 20 compound of Formula I is 1,6-diphenyl-1,5-hexadiene-3,4-diol, 3,4-dimethyl-1,6-bis(2,6,6-trimethyl-l-cyclohexen-1-yl)-1,5-hexadiene-3,4-diol, 3 ,4-dimethyl-1,6-bis(2,6,6-trimethyl-2-cyclohexen-1-yl)-1,5-hexadiene-3,4-diol, 1,2-bis(4-hydroxy-3-methoxyphenyl)-1,2-ethanediol, 25 1,2-bis(1,3-benzodioxol-5-yl)-1,2-ethanediol, 1,2-bis(4-methoxyphenyl)-1,2-ethanediol, 1,2-diphenyl-1,2-ethanediol, 1,6-bis(4-methoxyphenyl)-1,5-hexadiene-3,4-diol or 2,5-dihexyl-1,6-diphenyl-1,5-hexadiene-3,4-diol.
12. A method of flavouring a smoking composition, e.g. tobacco, or a food, comprising adding to the smoking composition, e.g. tobacco, or treating a food with an organoleptically effective amount of a 1,2 diol of the formula -12- OH OH C-R 1 I2 R 2 R 2 wherein R 1 is one of the radicals R C- 0@ a a a. C- where R 2 is H, lower alkyl R 3 R 4 are H, lower alkyl, lower alkoxy, hydroxy, or R 3 R 4 together are methylenedioxy, R 5 is lower alkyl and the broken lines represent in the ring one additional bond and in the side chain an optional bond.
13. A method of flavouring a smoking composition, e.g. tobacco, or a food, comprising igniting and burning the smoking composition, e.g. tobacco, or baking or microwaving the foodstuff containing an organoleptically effective amount of a 1,2 -diol of the formula OH OH R2 2 R R 13 wherein R' is one of the radicals R 3 R (a) (b)R3 where R 2 is H, lower alkyl R3,R4are H, lower alkyl, lower alkoxy, hydroxy, or R 3+ R 4together are miethyl enedioxy, R 5 is lower alkyl and the broken lines represent in the ring one additional bond and in the side chain an Optional bond. lo 14. A method according to claim 12 or claim 13) wherein, the 1,2 diol of Formula I I ,6-diphenyl-l ,5-hexadiene-3),4-diol, 99 4in t y -1 6 b s2 6 6 tim t y -y l h xe -l -e ad e e -i l 3 ~,4-dimethyl- 1, 6 -bis(2,6,6-trimethyl-2I-cyclohexen- 1-yl)-l ,5-hexadiene-3 ,4-diol, I 51 ,2-bis(4-hiydroxy-3 -methoxyphenyl)- 1,2-ethaniediol, I ,2-bis(l1,3J-benzodioxol-5-yl)- 1,2-ethanediol, I 2 -bis(4-mnethoxyphenyl)- 1 ,2-ethanediol, I ,2-diphenyl- I ,2-ethanediol, Goof 6 -bis(4-rnethoxyphenyl)- 1,5 -hexadiene-3,4-diol or 202,5 -dihexyl-1I,6-diphenyl- 1,5-hexadiene-3 ,4-diol. 1 5. 1 ,6-bis(4-Methoxyphenyl)- 1,5-hexadiene-3 ,4-diol. [[:\DAYLII3\LIBA]02937.doc TLT -14-
16. 2,5-Dihexyl- 1,6-diphenyl- 1,5-hexadiene-3,4-dio1.
17. Process for the preparation of 1,6-bis (4-methoxyphenyl)-1,5-. hexadjene-3 ,4-diol or of 2, 5-dihexyl- 1,6-diphenyl- 1,5-hexadiene-3 ,4-diol, comprising subjecting 1,4 -methoxycinnamaldehyde or a-hexyl- cinnarnaldehyde to pinacolisation.
18. The use of the 1,2 diols of the formula OH OH R R wherein R 1 is one of the radicals R 4* 0 480 S C S S0 8* 4 0 *5 *9 S 4~ J U
94. 40 4 *0C 0 0.04 9 S 0694 t. no. a 4 0 00'p* St 4i. e 4*4* S On. where R 2 is H, lower alkyl R 3 R 4 are H, lower alkyl, lower alkoxy, hydroxy, or R 3 R 4 together are methylenedioxy, R 5 is lower alkyl and the broken lines represent in the ring one additional bond and in the side chain an optional bond, as delayed flavourant release additives for smoking compositions and for food. 19. A delayed release flavourant composition, substantially as hereinbefore described with reference to any one of the Examples. A method of flavouring a smoking composition, substantially as hereinbefore described with reference to any one of the Examples. 21. Process for the preparation of 1,6-bis(4-methoxyphenyl)-1,5-hexadiene-3,4-diol or of 2,5-dihexyl-l,6-diphenyl-l,5-hexadiene-3,4-diol, substantially as hereinbefore described with reference to any one of the Examples. 22. A smoking composition when flavoured according to the method of any one of claims 12 to 14. 23. A food when flavoured according to the method of any one of claims 12 to 14. 24. 1,6-bis(4-methoxyphenyl)- 1,5-hexadiene-3,4-diol or of 2,5-dihexyl-1,6- diphenyl-1,5-hexadiene-3,4-diol when produced by the process of claim 17. Dated 7 January, 2000 Givaudan-Roure (International) SA Patent Attorneys for the Applicant/Nominated Person SPRUSON FERGUSON 00 0000 *0 *0 0 a. a 0.. 0000 [I:\DAYLIB\LIBA102937.doc:TLT
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JP (1) | JPH093477A (en) |
AU (1) | AU716962B2 (en) |
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DE (1) | DE69609897T2 (en) |
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JP3184864B2 (en) * | 1997-10-24 | 2001-07-09 | 日本たばこ産業株式会社 | Tobacco wrapper carrying a fragrance to improve tobacco sidestream odor, and cigarette |
US8157918B2 (en) | 2005-09-30 | 2012-04-17 | Philip Morris Usa Inc. | Menthol cigarette |
US7810507B2 (en) * | 2006-02-10 | 2010-10-12 | R. J. Reynolds Tobacco Company | Smokeless tobacco composition |
US8329239B2 (en) * | 2009-03-03 | 2012-12-11 | Givandan S.A. | Off-taste masking |
CN103385535B (en) * | 2012-05-09 | 2015-07-15 | 福建中烟工业有限责任公司 | Method for reducing energy consumption in cigarette shred production |
US10138392B2 (en) | 2013-03-29 | 2018-11-27 | The Chemours Company Fc, Llc | Non-fluorinated urethane based coatings |
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JPH01135867A (en) * | 1987-11-19 | 1989-05-29 | Adeka Argus Chem Co Ltd | Stabilized synthetic resin composition |
EP0578421A1 (en) * | 1992-07-09 | 1994-01-12 | Philip Morris Products Inc. | Smoking compositions containing an alpha-alkylcinnamaldehyde-release additive |
US5320131A (en) * | 1992-07-16 | 1994-06-14 | R. J. Reynolds Tobacco Company | Method of providing an aroma and flavor precursor for smoking articles |
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US3762423A (en) * | 1971-06-16 | 1973-10-02 | Liggett & Myers Inc | Methyl trans-2-isopropyl-5-methyl-3-hexenoate and derivatives thereof as tobacco flavorants |
US3854485A (en) * | 1973-09-24 | 1974-12-17 | Liggett & Myers Inc | Tobacco compositions comprising mono-esters of mono- and dialkylmalonates |
US4607118A (en) * | 1981-04-30 | 1986-08-19 | Philip Morris Incorporated | Flavor-release β-hydroxy-ester compositions |
US4509537A (en) * | 1983-04-04 | 1985-04-09 | Philip Morris Incorporated | Smoking compositions |
US4538627A (en) * | 1984-10-25 | 1985-09-03 | Philip Morris Incorporated | Smoking compositions containing a β-hydroxy-γ-ketoester flavorant-release additive |
US4638816A (en) * | 1985-03-22 | 1987-01-27 | Philip Morris Incorporated | Smoking compositions containing a glycosylamine flavorant additive |
US4690157A (en) * | 1986-03-21 | 1987-09-01 | Philip Morris Incorporated | Smoking compositions containing a flavorant-release additive |
US5371069A (en) * | 1990-12-12 | 1994-12-06 | Giuaudan-Roure Corporation | Organoleptic compositions |
US5199450A (en) * | 1991-02-26 | 1993-04-06 | Philip Morris Incorporated | Smoking compositions containing a tartrate salt flavorant-release additive |
US5228461A (en) * | 1991-04-22 | 1993-07-20 | Philip Morris Incorporated | Smoking compositions containing a vanillin-release additive |
US5172705A (en) * | 1991-09-25 | 1992-12-22 | Philip Morris Incorporated | Smoking compositions containing an oxalate flavorant-release additive |
US5501862A (en) * | 1993-12-22 | 1996-03-26 | Givaudan-Roure Corporation | Alkyl carbonate derivatives of sclareol diol |
US5538018A (en) * | 1995-04-05 | 1996-07-23 | Philip Morris Incorporated | Cigarette smoking products containing a vanillin-release additive |
US5759990A (en) * | 1996-10-21 | 1998-06-02 | The Procter & Gamble Company | Concentrated fabric softening composition with good freeze/thaw recovery and highly unsaturated fabric softener compound therefor |
US5747443A (en) * | 1996-07-11 | 1998-05-05 | The Procter & Gamble Company | Fabric softening compound/composition |
-
1996
- 1996-05-17 ZA ZA963968A patent/ZA963968B/en unknown
- 1996-05-31 US US08/657,864 patent/US5904148A/en not_active Expired - Fee Related
- 1996-06-03 DE DE69609897T patent/DE69609897T2/en not_active Expired - Fee Related
- 1996-06-03 ES ES96108849T patent/ES2151620T3/en not_active Expired - Lifetime
- 1996-06-05 CA CA002178289A patent/CA2178289A1/en not_active Abandoned
- 1996-06-07 AU AU55885/96A patent/AU716962B2/en not_active Ceased
- 1996-06-07 JP JP8146093A patent/JPH093477A/en active Pending
- 1996-06-07 BR BR9602708A patent/BR9602708A/en active Search and Examination
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1998
- 1998-07-14 US US09/114,983 patent/US5921247A/en not_active Expired - Fee Related
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1999
- 1999-05-11 US US09/309,628 patent/US6194019B1/en not_active Expired - Fee Related
Patent Citations (3)
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JPH01135867A (en) * | 1987-11-19 | 1989-05-29 | Adeka Argus Chem Co Ltd | Stabilized synthetic resin composition |
EP0578421A1 (en) * | 1992-07-09 | 1994-01-12 | Philip Morris Products Inc. | Smoking compositions containing an alpha-alkylcinnamaldehyde-release additive |
US5320131A (en) * | 1992-07-16 | 1994-06-14 | R. J. Reynolds Tobacco Company | Method of providing an aroma and flavor precursor for smoking articles |
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DE69609897T2 (en) | 2001-04-05 |
MX9602101A (en) | 1997-09-30 |
US6194019B1 (en) | 2001-02-27 |
CA2178289A1 (en) | 1996-12-09 |
US5921247A (en) | 1999-07-13 |
DE69609897D1 (en) | 2000-09-28 |
JPH093477A (en) | 1997-01-07 |
ES2151620T3 (en) | 2001-01-01 |
BR9602708A (en) | 1998-09-08 |
AU5588596A (en) | 1996-12-19 |
US5904148A (en) | 1999-05-18 |
ZA963968B (en) | 1996-12-09 |
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